Tucson, Arizona

Distance from Baltimore: 2,307 miles, about a five-hour flight Why it's hot: From rock climbers and bird watchers to gamblers, shoppers and history enthusiasts, Tucson attracts visitors of all kinds. Learn about the cosmos at the world-class Fred Lawrence Whipple Observatory or the Pima Air &

Distance from Baltimore: 2,307 miles, about a five-hour flight Why it's hot: From rock climbers and bird watchers to gamblers, shoppers and history enthusiasts, Tucson attracts visitors of all kinds. Learn about the cosmos at the world-class Fred Lawrence Whipple Observatory or the Pima Air & (Ritz Carlton Photo)

Distance from Baltimore: 2,307 miles, about a five-hour flight Why it's hot: From rock climbers and bird watchers to gamblers, shoppers and history enthusiasts, Tucson attracts visitors of all kinds. Learn about the cosmos at the world-class Fred Lawrence Whipple Observatory or the Pima Air &ampRitz Carlton Photo